<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
<!--css 3.0-->
<!--    <link rel="stylesheet" href="../css/css.css">-->

<!--    css2.1 -->
    <style>
        @import url("../css/css.css");
    </style>

    <style>

        /*
    选择器{
        声明1:值;
        声明2:值;
        `````
    }
        */
        h1 {
            color: pink;
            background-color: yellow;
            font-family: Arial;
            font-size: 16px;
        }
    </style>

</head>
<body>

<h1 style="color: red">RuanJianCeShi</h1>
<h1>test</h1>

</body>
</html>